EP2108218A1 - Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation - Google Patents

Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation

Info

Publication number
EP2108218A1
EP2108218A1 EP08728850A EP08728850A EP2108218A1 EP 2108218 A1 EP2108218 A1 EP 2108218A1 EP 08728850 A EP08728850 A EP 08728850A EP 08728850 A EP08728850 A EP 08728850A EP 2108218 A1 EP2108218 A1 EP 2108218A1
Authority
EP
European Patent Office
Prior art keywords
coupled
switching
switching devices
control
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08728850A
Other languages
German (de)
English (en)
Inventor
Larry Kirn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM ELECTRONICS Ltd LLC
Original Assignee
JM ELECTRONICS Ltd LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JM ELECTRONICS Ltd LLC filed Critical JM ELECTRONICS Ltd LLC
Publication of EP2108218A1 publication Critical patent/EP2108218A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Definitions

  • a switching device includes a first set of switching devices operable to be coupled to a first voltage and a second set of switching devices operable to be coupled to a second voltage.
  • the switching amplifier further comprising a modulator configured to control the first set of switching devices at a first sampling rate and configured to control the second set of switching devices at a second sampling rate to provide first and second voltages to the load in accordance with the input signal, the first sampling rate lower than the second sampling rate.
  • Figure 1 is directed to a dual reference switching amplifier, a person of ordinary skill in the art would appreciate that the invention applies to any multi-reference switching amplifier.
  • the dual reference switching amplifier of Figure 1 has two references, positive power supply voltage V+ and the voltage supplied from V+ by a regulator 114.
  • Positive power supply voltage V+ supplies energy to a load 119 through control switches 108, 111.
  • the regulator 114 supplies energy to the load 119 through switches 109, 1 12.
  • Ground is provided to the load 119 through switching devices 110, 113.
  • the voltage supplied by the V+ reference is significantly greater than the voltage supplied by the regulator 114.
  • the voltage supplied by the positive power supply voltage V+ reference is approximately 12V, and the voltage supplied by the regulator 114 is 47mV.
  • the circuit of Figure 1 results in two separate PWM datastreams on each side of the load 1 19.
  • the PWM datastream that is applied to the load 119 through switching devices 108, 111 is a coarse high voltage modulated stream.
  • the pulse width modulated datastream that is applied to the load 119 through switching devices 109, 1 12 is a fine low voltage modulated stream.
  • the configuration of the coarse and fine voltage stream is dependent upon which switching devices are coupled to the high voltage source and the low voltage source.
  • Trace 300 shows the datastream 100 waveform of Figure 1 to be amplified.
  • Traces 301, 302, 303, 304, 305, and 306 show signals 101, 102, 103, 104, 105, 106 which control switching devices 108, 109, 110, 111, 112, 113, respectively.
  • Trace 307 shows the collective outputs of switching devices 108, 109, and 110, as input to inductor 115.
  • Trace 308 shows the collective outputs of switching devices 111, 112, 113, as input to inductor 117. Similar to that of Figure 2, the V+ coarse modulated and the reference voltage fine modulated pulses in traces 307, 308 follow opposing signs of incoming waveform 300.
  • reducing the sampling rate frequency results in a reduction in RF interference. Therefore, reducing the frequency of both the V+ coarse and reference voltage fine modulated pulses results in less RF interference, however, reducing the frequency of the coarse modulated pulses has a greater effect on reducing RF interference than reducing the frequency of the fine modulated pulses. Although reducing the coarse modulated pulses results in lower RF interference, it also introduces distortion to the output signal. However, by maintaining the fine modulated pulses at an acceptable frequency, such as the frequency used in the prior art, the fine modulated pulses lessens the impact of the distortion caused by the reduced frequency of the coarse modulated pulses. In addition, the fine modulated pulses provide a mechanism in which predictive distortion mitigation may be applied.
  • the coarse pulse duty cycle is not disturbed by the decrease in frequency.
  • the sampling rate of the coarse modulated pulses has decreased, the duty cycle has remained proportional the coarse modulated pulses in Figure 2.
  • the V+ coarse modulated pulses resultant of traces 307, 308 are twice as long and half as frequent as the V+ coarse modulated pulses in traces 207, 208 of Figure 2.
  • the resultant integrals of traces 307, 308 of Figure 3 are therefore equivalent to the integrals of traces 207, 208 of Figure 2, but the frequency of emissions are reduced by one half.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

L'invention concerne un système et un procédé pour réduire une interférence RF dans des amplificateurs de commutation sans dégrader leurs performances. Dans un mode de réalisation, le taux d'échantillonnage des durées d'impulsion modulées par une haute tension grossière diminue par rapport au taux d'échantillonnage des durées d'impulsion modulées par une basse tension fine. La réduction du taux d'échantillonnage des durées d'impulsion modulées par une haute tension grossière a pour résultat une réduction d'EMI. De plus, le taux d'échantillonnage plus élevé des durées d'impulsion modulées par une basse tension fine atténue la distorsion provoquée par le taux d'échantillonnage réduit des durées d'impulsions grossières.
EP08728850A 2007-02-01 2008-02-01 Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation Withdrawn EP2108218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88766207P 2007-02-01 2007-02-01
PCT/US2008/052827 WO2008095173A1 (fr) 2007-02-01 2008-02-01 Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation

Publications (1)

Publication Number Publication Date
EP2108218A1 true EP2108218A1 (fr) 2009-10-14

Family

ID=39415423

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08728850A Withdrawn EP2108218A1 (fr) 2007-02-01 2008-02-01 Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation
EP08728862A Withdrawn EP2108219A1 (fr) 2007-02-01 2008-02-01 Procédé et système pour augmenter la fréquence d'échantillonnage pour des amplificateurs de commutation

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08728862A Withdrawn EP2108219A1 (fr) 2007-02-01 2008-02-01 Procédé et système pour augmenter la fréquence d'échantillonnage pour des amplificateurs de commutation

Country Status (6)

Country Link
US (2) US8044715B2 (fr)
EP (2) EP2108218A1 (fr)
JP (2) JP4871398B2 (fr)
KR (2) KR101122847B1 (fr)
CN (2) CN101652924B (fr)
WO (2) WO2008095181A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2108218A1 (fr) 2007-02-01 2009-10-14 JM Electronics Ltd. Llc Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation
US8306096B2 (en) * 2009-06-26 2012-11-06 Qualcomm Incorporated Interference reduction using variable digital-to-analog converter (DAC) sampling rates
US8330541B2 (en) 2011-03-01 2012-12-11 Maxim Integrated Products, Inc. Multilevel class-D amplifier
CN102843110B (zh) * 2011-06-22 2016-02-24 无锡闻德科技有限公司 三电平d类音频功率放大器
US8643436B2 (en) * 2011-11-22 2014-02-04 Analog Devices, Inc. Multi-level boosted Class D amplifier
EP2654205B1 (fr) * 2012-04-16 2016-08-17 Nxp B.V. Amplificateurs de classe D
US8710922B2 (en) * 2012-05-11 2014-04-29 Nuvoton Technology Corporation Method and apparatus for filter-less class D audio amplifier EMI reduction
US10673397B2 (en) * 2017-03-01 2020-06-02 Novatek Microelectronics Corp. Operational amplifier
JP7495430B2 (ja) 2019-04-17 2024-06-04 バード・アクセス・システムズ，インコーポレーテッド 長尺状医療部材を安定させるための固定装置およびカテーテルアセンブリの固定方法
KR102702613B1 (ko) 2022-08-29 2024-09-05 인하대학교 산학협력단 스위칭 노이즈 감소를 위한 다중 레퍼런스 스위칭 증폭기의 변조 방법 및 시스템

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5559467A (en) 1995-01-27 1996-09-24 The Regents Of The University Of California Digital, pulse width modulation audio power amplifier with noise and ripple shaping
US5663647A (en) * 1995-12-29 1997-09-02 General Electric Company Switching gradient amplifier with adjustable DC bus voltage
DE19837439C2 (de) 1998-08-18 2000-07-13 Siemens Ag Verfahren und Vorrichtung zum Erzeugen von Ansteuersignalen für eine Leistungsendstufe und Leistungsendstufe
US6031746A (en) * 1998-09-04 2000-02-29 General Electric Company Switching amplifier for generating continuous arbitrary waveforms for magnetic resonance imaging coils
US6535058B1 (en) * 1998-11-12 2003-03-18 Jam Technologies, Llc Multi-reference, high-accuracy switching amplifier
JP3527133B2 (ja) * 1999-04-15 2004-05-17 シャープ株式会社 １ビット信号再生装置
KR20020056877A (ko) * 2000-05-25 2002-07-10 롤페스 요하네스 게라투스 알베르투스 로직 회로, 푸시 풀 증폭기, 로직 상태의 시퀀스 수행방법 및 핸드셰이킹 방법
US6593807B2 (en) 2000-12-21 2003-07-15 William Harris Groves, Jr. Digital amplifier with improved performance
JP3772970B2 (ja) * 2001-10-29 2006-05-10 ソニー株式会社 Ｄ／ａ変換器および出力増幅回路
DE60317299T2 (de) * 2003-02-17 2008-08-28 D&M Holdings, Inc., Sagamihara Pulsbreitenmodulationsverstärker
JP4197988B2 (ja) * 2003-06-03 2008-12-17 シャープ株式会社 オーディオ再生装置
JP4791740B2 (ja) * 2005-03-14 2011-10-12 旭化成エレクトロニクス株式会社 デジタルスイッチングアンプ
CN101160716B (zh) 2005-04-07 2012-10-03 Nxp股份有限公司 包括开关放大器和负载的装置
EP2108218A1 (fr) 2007-02-01 2009-10-14 JM Electronics Ltd. Llc Réduction de la fréquence d'échantillonnage pour amplificateurs de commutation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008095173A1 *

Also Published As

Publication number Publication date
JP4875170B2 (ja) 2012-02-15
US8044715B2 (en) 2011-10-25
WO2008095173A1 (fr) 2008-08-07
CN101647199A (zh) 2010-02-10
JP2010518708A (ja) 2010-05-27
CN101652924A (zh) 2010-02-17
JP4871398B2 (ja) 2012-02-08
WO2008095181A1 (fr) 2008-08-07
CN101652924B (zh) 2013-03-06
KR20090104879A (ko) 2009-10-06
US20100001794A1 (en) 2010-01-07
KR101122390B1 (ko) 2012-03-23
EP2108219A1 (fr) 2009-10-14
CN101647199B (zh) 2013-03-20
KR20090103935A (ko) 2009-10-01
US8076971B2 (en) 2011-12-13
KR101122847B1 (ko) 2012-03-22
JP2010518706A (ja) 2010-05-27
US20100102881A1 (en) 2010-04-29

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